Buggy code:
public class MainFrame extends JFrame implements DropTargetListener , ActionListener , Clearable , Remoteable , TestStateListener { private static final long serialVersionUID = 240L ; private static final String LOCAL = "*local*" ; private static final String DEFAULT_APP_NAME = "Apache<seq2seq4repair_space>JMeter" ; private static final String DEFAULT_TITLE = ( ( ( MainFrame . DEFAULT_APP_NAME ) + "<seq2seq4repair_space>(" ) + ( JMeterUtils . getJMeterVersion ( ) ) ) + ")" ; private static final boolean DISPLAY_TOOLBAR = JMeterUtils . getPropDefault ( "jmeter.toolbar.display" , true ) ; private static final boolean DISPLAY_LOGGER_PANEL = JMeterUtils . getPropDefault ( "jmeter.loggerpanel.display" , false ) ; private static final boolean DISPLAY_ERROR_FATAL_COUNTER = JMeterUtils . getPropDefault ( "jmeter.errorscounter.display" , true ) ; private static final Logger log = LoggingManager . getLoggerForClass ( ) ; private JMeterMenuBar menuBar ; private JScrollPane mainPanel ; private JScrollPane treePanel ; private LoggerPanel logPanel ; private JTree tree ; private final ImageIcon runningIcon = JMeterUtils . getImage ( "thread.enabled.gif" ) ; private final ImageIcon stoppedIcon = JMeterUtils . getImage ( "thread.disabled.gif" ) ; private final ImageIcon warningIcon = JMeterUtils . getImage ( "warning.png" ) ; private JButton runningIndicator ; private final Set < String > hosts = new HashSet < String > ( ) ; private JDialog stoppingMessage ; private JLabel totalThreads ; private JLabel activeThreads ; private JMeterToolBar toolbar ; private JButton warnIndicator ; private JLabel errorsOrFatalsLabel ; private transient MainFrame . ErrorsAndFatalsCounterLogTarget errorsAndFatalsCounterLogTarget ; public MainFrame ( TreeModel treeModel , JMeterTreeListener treeListener ) { } @ Deprecated public MainFrame ( ) { } public void setFileLoadEnabled ( boolean enabled ) { } public void setFileSaveEnabled ( boolean enabled ) { } public void setFileRevertEnabled ( boolean enabled ) { } public void setProjectFileLoaded ( String file ) { } public void setEditMenu ( JPopupMenu menu ) { } public void setEditEnabled ( boolean enabled ) { } public void setEditAddMenu ( JMenu menu ) { } public void setEditAddEnabled ( boolean enabled ) { } public void closeMenu ( ) { } public void showStoppingMessage ( String host ) { } public void updateCounts ( ) { } public void setMainPanel ( JComponent comp ) { } public JTree getTree ( ) { } @ Override public void testStarted ( ) { } @ Override public void testStarted ( String host ) { } @ Override public void testEnded ( ) { } @ Override public void testEnded ( String host ) { } private void init ( ) { menuBar = new JMeterMenuBar ( ) ; setJMenuBar ( menuBar ) ; JPanel all = new JPanel ( new BorderLayout ( ) ) ; all . add ( createToolBar ( ) , BorderLayout . NORTH ) ; JSplitPane treeAndMain = new JSplitPane ( JSplitPane . HORIZONTAL_SPLIT ) ; treePanel = createTreePanel ( ) ; treeAndMain . setLeftComponent ( treePanel ) ; JSplitPane topAndDown = new JSplitPane ( JSplitPane . VERTICAL_SPLIT ) ; topAndDown . setOneTouchExpandable ( true ) ; topAndDown . setDividerLocation ( 0.8 ) ; topAndDown . setResizeWeight ( 0.8 ) ; topAndDown . setContinuousLayout ( true ) ; topAndDown . setBorder ( null ) ; if ( ! ( MainFrame . DISPLAY_LOGGER_PANEL ) ) { topAndDown . setDividerSize ( 0 ) ; } mainPanel = createMainPanel ( ) ; logPanel = createLoggerPanel ( ) ; if ( MainFrame . DISPLAY_ERROR_FATAL_COUNTER ) { errorsAndFatalsCounterLogTarget = new MainFrame . ErrorsAndFatalsCounterLogTarget ( ) ; LoggingManager . addLogTargetToRootLogger ( new LogTarget [ ] { logPanel , errorsAndFatalsCounterLogTarget } ) ; } else { LoggingManager . addLogTargetToRootLogger ( new LogTarget [ ] { logPanel } ) ; } topAndDown . setTopComponent ( mainPanel ) ; topAndDown . setBottomComponent ( logPanel ) ; treeAndMain . setRightComponent ( topAndDown ) ; treeAndMain . setResizeWeight ( 0.2 ) ; treeAndMain . setContinuousLayout ( true ) ; all . add ( treeAndMain , BorderLayout . CENTER ) ; getContentPane ( ) . add ( all ) ; tree . setSelectionRow ( 1 ) ; addWindowListener ( new MainFrame . WindowHappenings ( ) ) ; setTitle ( MainFrame . DEFAULT_TITLE ) ; <START_BUG> setIconImage ( JMeterUtils . getImage ( "jmeter.jpg" ) . getImage ( ) ) ; <END_BUG> setWindowTitle ( ) ; } public void initTopLevelDndHandler ( ) { } public void setExtendedFrameTitle ( String fname ) { } private Component createToolBar ( ) { } private JScrollPane createTreePanel ( ) { } private JScrollPane createMainPanel ( ) { } private LoggerPanel createLoggerPanel ( ) { } private JTree makeTree ( TreeModel treeModel , JMeterTreeListener treeListener ) { } private TreeCellRenderer getCellRenderer ( ) { } private static class WindowHappenings extends WindowAdapter { @ Override public void windowClosing ( WindowEvent event ) { } } @ Override public void dragEnter ( DropTargetDragEvent dtde ) { } @ Override public void dragExit ( DropTargetEvent dte ) { } @ Override public void dragOver ( DropTargetDragEvent dtde ) { } @ Override public void drop ( DropTargetDropEvent dtde ) { } public boolean openJmxFilesFromDragAndDrop ( Transferable tr ) throws UnsupportedFlavorException , IOException { } @ Override public void dropActionChanged ( DropTargetDragEvent dtde ) { } public final class ErrorsAndFatalsCounterLogTarget implements Clearable , LogTarget { public AtomicInteger errorOrFatal = new AtomicInteger ( 0 ) ; @ Override public void processEvent ( LogEvent event ) { } @ Override public void clearData ( ) { } } @ Override public void clearData ( ) { } @ Override public void actionPerformed ( ActionEvent event ) { } private void setWindowTitle ( ) { } }

Fix:
setIconImage ( JMeterUtils . getImage ( "icon-apache.png" ) . getImage ( ) ) ;